package chapter04.Example15;
class Animal{
    public void shout(){
        System.out.println("喵喵喵......");
    }
}
class Dog extends Animal{
    public void shout(){
        System.out.println("汪汪汪......");
    }
    public void eat(){
        System.out.println("吃骨头......");
    }
}

public class Example15 {
    public static void main(String[] args){
        Dog dog = new Dog();
        Animal a1 = dog;
        a1.shout();
        // a1.eat();  Animal没有eat方法 所以eat无法使用

    }
}
